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From:	Fred Kemp <c DOT f DOT kemp AT reading DOT ac DOT uk>
To:	cygwin AT cygwin DOT com
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Subject:	rsync 3.0.4 over ssh hanging on cygwin 1.7
Date:	Tue, 18 Nov 2008 17:09:46 +0000
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Good afternoon all,

Please excuse my cygwin newbie status if I have missed something  
obvious.

Having resolved the "overly long file name" issue with rsync in cygwin  
1.5 by upgrading to version 1.7, I have hit a new problem, namely  
rsync hanging midway through transfer. No errors are reported or  
logged, nothing seems to be timing out, it just sits there  
indefinitely. Re-running rsync will maybe do a couple more files then  
hang again, and again, and again... Having read around tinternet, it  
seems I am not completely alone in this problem, but I have yet to  
find a solution that works for me. Briefly:

I have set up ssh-keyless authentication between my server (OsX  
10.5.5, rsync 3.0.4, OpenSSH 5.1p1) and a dozen or so PC's running  
XPsp2 (cygwin 1.7,  rsync 3.0.4, OpenSSH 5.1p1) and use rsync to  
mirror user directories on the PC's to my server, as follows:

rsync --verbose --progress --stats --rsh=/usr/bin/ssh --archive \
Administrator AT clientPC:"/cygdrive/c/Documents\ and\ Settings/ 
userdirectory/" /Users/userdirectory/

This is in effect identical to the method I use to mirror data between  
two OsX servers, where it can happily handle several terabytes of data  
and millions of files. I have tried rsyncing individual subdirectories  
in a userdirectory and that works fine but still it hangs when the  
whole directory is tried again. Similarly, one or two of the smaller  
user directories (around 15,000 files and 35Gb data) work fine. Over  
around 30,000 files seems to be where I have the problem...

What is really strange is that if I run the rsync from the client PC  
to the server, it works fine, and subsequent rsyncs from the server  
also work fine (presumably since hardly any files have changed)...

At this stage I am somewhat stumped and would appreciate any pointers  
the gurus can give, even as to whether this is believed to be an  
rsync, sshd or underlying cywin issue... Very happy to provide further  
info as required, or to be shot down in flames should I have done  
something stupid! ;-)

Thanks in advance,

Fred.


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